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Human cell line secretome represents a valuable source of therapeutic targets and candidate biomarkers. Secreted proteins found in biological fluids or culture media are by essence highly diluted. Secretome investigation with proteomic approaches is hardly compatible with the high content of proteins found in complete cell culture media. Therefore, many studies are currently done with media containing...
Our study aimed to compare death signalling pathways triggered by lupulone in TRAIL-sensitive human colon cancer cells (SW480) and in their derived TRAIL-resistant metastatic cells (SW620). Lupulone (40 μg/ml) up-regulated expression of TRAIL DR4/DR5 death receptors at the cell surface of both cell lines, even in the absence of exogenous TRAIL ligand. Cell death induced by lupulone was inhibited in...
We reported previously that 7β-hydroxysitosterol and 7β-hydroxycholesterol induced apoptosis in Caco-2 cells. Apoptosis caused by 7β-hydroxysitosterol but not by 7β-hydroxycholesterol was related to a caspase-dependent process. In the present report, we compared the effects of both compounds on mitochondria integrity and on various modulators of apoptosis. When Caco-2 cells were exposed to both hydroxysterols,...
As vegetable oils and phytosterol-enriched spreads are marketed for frying food or cooking purposes, temperature is one of the most important factors leading to the formation of phytosterol oxides in food matrix. A methodology based on saponification, organic solvent extraction, solid-phase extraction (SPE), followed by mass spectrometric identification and quantitation of β-sitosterol oxides using...
The pro-apoptotic ability of (Z)-3,5,4'-Tri-O-methyl-resveratrol (R3) was investigated in vitro on the human lymphoblastoid cell line TK6 and its p53-knockout counterpart (NH32). In both cell lines, R3 induced the stimulation of caspase-3. Although R3 induced growth inhibition and apoptosis of both cell lines, two distinct mechanisms were observed. The p53-knockout NH32 cells were shown to override...
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